groceries: add PLUS, Xenos and Amazing Oriental stores, is_food flag, PLUS EAN backfill

src/routes/trackers/groceries/+page.svelte

@@ -272,6 +272,9 @@
 		<label class="check"
 			><input type="checkbox" name="multi" value="1" checked={data.filters.multi} /> In 2+ stores</label
 		>
+		<label class="check" title="Also show homeware and other non-food (mostly Xenos)"
+			><input type="checkbox" name="nonfood" value="1" checked={data.filters.nonfood} /> Non-food</label
+		>
 		<Button type="submit" variant="outline">Search</Button>
 		<div class="segmented ml-auto" role="group" aria-label="Compare by">
 			<button type="button" aria-pressed={mode === 'unit'} onclick={() => (mode = 'unit')}